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JAMES S. BALDWIN, OF' NEWARK, NEW JERSEY, ASSIGNOR TO CHARLES F. RITCHEL, OF SAME PLAGE.

Letters Patent N 107,150, dated September 6, 1870.

METHOD OP INLY'ING WOOD, 8cc.

The Schedule referred to in these Letters Patent and making part of the lname:

To all whom it'may concern ings and te the letters of reference marked thereon making a part of' this sl'iecilii-ation.

In the method of' inlaying heretofbre practiced it has been customary to cut, in the material forming the base or tbundatiou of' the fabric, cavities of suitable shape and size, which were then filled with pieces, singly and' carefully fitted to their places. This has been necessarily a tedious and laborious operation.

Another variety of' work has been formed by fitting pieces to each other, the whole being cemented to and sustained by a suitable base, which does not itself appear in the pattern.

Io produce the same results by my improved system, I first. build up or insert a portion ot the design, and then cut additional cavities in the whole. fabric thus formed, fill these cavities` and continue the cutting and filling operations until the whole is coinpleled.

In Figure 1 in Vthe accompanying drawings- A shows two cavities;

B, the saine filled;

C, a third cavity cut through the partially formed design;

I), a fourth cavity; and A E, the completed ligure, to form which, by the old method, would require the insertioll of eight pieces instead of four, as in my improved method.

' Figure 2 shows a rosette formed of seven pieces by my plan, in which its superiority is still more apparent, and what is true'ot' circles is true of other forms. v

Figures 3 land 4 represent iu front elevation and partial section a machine for inserting the pieces in the cavities prepared f'or them.

A For convenience of illustration, only one piece is shown undergoing the operation; but, by increasing the size and number of the several parts, any desired number of pieces can be inserted at once.

FF F F is the frame.

L' L', the piece into which the circular cavity G G is cut.

-M is a mandrel securely fastened to F F FF, its lower end M being represented in section.

H H is the piece to be inserted; also,

0 is a plate sliding on the mandrel M, and forcing H H firmly and evenly lto its place, by pressure on K, transmitted by the rods L L.

H is used long enough to fill several cavities, being out oft each time.

Figures 5 and 6 representan improved method of firmly securing the inlaid pieces.

A wuntersunk cavity, G G', is cut and filled, asuit able hase, L, tig. 6, is firmly fastened to the back of' the fabric by cement or other suitable means, V W representing the line -ot junction, and the portion X boing now cut oli' by a splitting or rip-saw on the line P Q the design is uncovered by inserting cozn posit'e pieces of diftlrent colored woods, previously cemented or otherwise firmly united prior to insertion, the economy and beauty ot the work are materially enhanced. l

Figure 7 shows such a piece in plan and section, formed by cementiug together before insertion several concentric 'and different-,colored rings, the whole heilig treated like H H, figs. 3 and 4. t

It will be understood that, by my improved system, not only may a complicated design be produced with fewer pieces, but in suoli design all the pieces cut and inlaidwll be similar in size and shape, all the cavities be similar, and tin-ther, that the stock .of the base or foundation slab which is inlaid will interlock with the inserted pieces, so as to induce` to great strength in the whole design.

Of` course, any machinery or tools deemed best may be employed to cut the cavities and insert the pieces. For cutting annular cavities and inserting cylindrical rings, the devices shown I deem well adapted to the purposes of' carrying out my invention.

I am aware that designs in cutting and engraving have been produced by a series of' circular or other shaped figures cut across each other, such as doneV in lathe work on watches, Sac., and I am also aware 0f designs f'or inlaying 'having been suggested, in which a series of circles or polygons are represented interlocking eachother; butin all such designs the stock-is cut awayentirely, and all the figures shown in the design are composed of separate pieces of stock.

W'hat I-claim as new, and desire to secure by Letters Patent, is-'- l Producing designs of inlaid work by cutting out the base or foundation stock and inserting a figure, and then cutting out boththe stock and the inserted iigure for the insertion of another figure, substantially as hereinbefore set forth and described.

JAMES S. BALDWIN. Witnesses:

Geo. A. BvLn,

O. F. RITGHEL. 

